Punching-machine.



S. BIGAZZIA: V. SGOPETANI. PUNGHING MACHINE. APrLIoATIoN FILED JUNI: 14,1910.

A Patented Jan. 3, 1911.;

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SILVIS BIGAZZI AND VINCENZO SCOPETANI, OF FLORENCE, ITALY.

PUNCHINGr-MACHINE.

Specification of Letters Patent.

Patented Jan. 3, 1911.

Application filed .Tune 14, 1910. Serial No. 566,859.

To all whom it 'may concern:

Be it known that we, SiLvis BioAzzi, engineer, and VINCENZO Soorn'rANi,subjects of the King of Italy, residing at Florence, Italy, haveinvented new and useful Improvements in Punching-Machines, of which thefollowing is a specification.

The appliance herewith described as an automatic compound multiplexpunching machine, and of which a sectional side view is given in annexeddrawing, can be adapted, between the sliding tool carrier andcorresponding table, to any punch press.

A special punch carrier or holder 1, to be fixed by means of the shaftat its upper end, to the sliding tool carrier of a punching inachine,carries with it fastened to it below by means of the set screw 3, thehollow punch 4- traversed from side to side by the slot 2, and thecutting edge of which 5 is fashioned in conformity with the object whichit is desired to cut out of a flat st-rip or sheet of iron or othermetal with a single stroke. In the case of the annexed design said punchis in the shape of a circular crown, corresponding to that of a washerfor bolts. Below, and corresponding to said punch 4, a compound matrixis fixed, consisting of the collar 6 and of the concentric punch 7, bothsecured to the base 8 of the appliance, which is firmly fixed to thetable of the punch press.

The punch 7 and the collar 6 leave between them a space having the exactform of the cutting face 5 of the punch 4, which in the case of thefigure is a circular crown as has been said above.

l/Vhen a fiat strip or sheet of iron is placed on the surface C of thematrix 6 and 7, and the punch 4 is lowered, this cuts out with a singlestroke a flat washer 9, which will be driven by the descending tool intothe annular space of the matrix on the movable piece 10, fashioned likea ring or collar and sliding on the shaft of the punch 7. Said ring 10is intended to eject the washer in the following manner: It rests on itslower end, which is suitably curved, on the arm of the horizontal lever11, the fulcrum of which is the pivot 12 fixed to the base 8 of theappli-- ance; while said lever 11 by means of the power applied at 18 bythe connecting rod jointed at 14 and attached at 15, is raised andlowered by the arm 16, fastened by the screw 17 to the punch carrier orholder 1.

llhen the tool 4 is lowered it cuts out the piece and forces it to passdownward between the punch 7 and the collar 6 and into engagement withthe sliding collar 10. During the return movement of the punch, thelever 11 which is operatively connected thereto by the arm 16 is raised,thus raising the sliding collar 10 and causing the latter to eject abovethe surface C the piece which has been cut out.

The lower end of the jointed connecting rod is threaded at 13, which, bymeans of two nuts that lock between them a piece of tube intended toplay through the eye-hole of the lever 11, serves to regulate theoscillatory motion of said lever, and consequently the throw of thesliding ejector 10.

The central disk punched out of washers, and in general the pieces cutout by the fixed punch 7, for which the movable punch 4 serves as amatrix, are automatically ejected rising through the interior of saidmatrix or die till they reach the slot 2, from which they are pushed outby the ejecting lever 18, which is pivoted at 19 to the fixed upright 2lsustained by the rectangular arm 22 which is fastened to the base ortable 8. An antagonist-ic spring 20 constantly holds this ejecting leverdown on the lower surface of the slot 2 insuring its proper action.

The appliance here described being entirely free from obstacles in frontand at the sides, allows of the introduction of any sheet or plate underthe tool or punch; and this disposition is of special importance inmaking pieces for sheet metal cornices, friezes, etc. It is then obviousthat the length of the arms 16 and 11, 18 and 22 in order to have thegreatest possible sweep under the punch, will be as great as possiblecompatibly with the projection of the slide of punching 1nachineemployed.

We claim.

1. In a punching machine, in combination, a reciprocable hollow punch, astationary punch adapted to extend within said hollow punch when thelatter is in its operative position and means for disengaging thepunched-out article from said stationary punch.

2. In a punching machine, in combination, a reciprocable hollow punch, astationary punch adapted to extend within said hollow punch when thelatter is in its o erative position, a movable member operativelyassociated with said stationary punch and adapted to receive upon itssurface the punched-out article and means for raising said member todisengage the article from l formed ,to correspond in size andconformasaid stationary punch.

3. In a punching machine, in combination, a reciprocable hollow punch,.a lstationary punch adapted to extend within said hollow punch when thelatter is in its operative position, a vmovable member surround-4 ingsaid stationary punch and adapted to receive upon its surface thepunched out article `and means for raising said member to disengage thearticle from `said .stationary punch.

4. In a punching machine, in combination, a reciprocable hollow punch,Aa stationary punch adapted to extend within said hollow punch when thelatter is .in its operative position, a movable member .operativelyassociated withsaid stationary .punch and adapted to receive upon itssurface ,the punched-out article and means actuated by the returnmovement of said movable punch for raising said member to disengage .thearticle from said stationary punch.

5. In a punching machine, in combinat-ion, a reciprocable holder, ahollow punch carried thereby and movable therewith, a stationary punchadapted to extend within said hollow 4punch when the latter is in itsoperative position, .a movable member operatively associated with said.stationary punch and adapted to receive upon Aits surf facie thepunched-out article and means operatively connected to said holder forraising said member to disengage the article Vfrom the stationary .dieas the holder returns to its operative position.

6. In a punching machine, in ,combination, a reciprocable' hollow punchand a matrix comprising an outer member and an inner member Yhavingtheir surfaces flush with one another, said outer member having anVopening corresponding in size and conformation with the outer surface ofsaid hollow punch and said inner member being tion with the opening invsaid hollow punch and being positioned to extend within said hollowpunch when the latter is in its operative position.

7. In a ,punching machine, in combination, a hollow punch, a punchadapted toV extend within said hollow punch, means for reciprocating oneof said punches to punch articles from the material to be operated upon,and means for removing from said hollow punch the portion of thematerial punched out by said second-mentioned punch.

8. In a punching machine, in combination, a reciprocating hollow punchprovided with an opening extending transversely therethrough, `astationary punch adapted to extend 'within said hollow punch when thelatter is in its operative position and means extending within saidtransverse opening to eject therefrom the portions of the materialpunched out by said stationary punch.

9. In a punching machine, lin .combination, a reciprocable hollow punchprovided with an opening extending transversely therethrough, astationary punch adapted to extend within said hollow punch when thelatter is in its operative position and an ejecting arm pivotallysupported upon the frame of the machine and having its free endextending within said transverse opening to eject therefrom the portionsof the material punched out by said stationary punch.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

SILVIS BIGAZZI. [L. s.] VINCENZO SCOIETANI. [5. s] Witnesses:

BRUNO MARINNI, C. FAMI.

